Multiple button 0r Activity Android Studio

Xml Code

<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button" tools:layout_editor_absoluteX="149dp" tools:layout_editor_absoluteY="187dp" tools:ignore="MissingConstraints" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button" tools:layout_editor_absoluteX="156dp" tools:layout_editor_absoluteY="299dp" tools:ignore="MissingConstraints" /> </androidx.constraintlayout.widget.ConstraintLayout>

Java Code

import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; public class MainActivity extends AppCompatActivity implements View.OnClickListener{ Button button,button2; Intent intent; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button = findViewById(R.id.button); button2 = findViewById(R.id.button2); button.setOnClickListener(this); button2.setOnClickListener(this); } @Override public void onClick(View v) { if (v.getId() == R.id.button) { intent = new Intent(MainActivity.this, MainActivity2.class); startActivity(intent); }else if (v.getId()==R.id.button2) { intent = new Intent(MainActivity.this, MainActivity2.class); startActivity(intent); } } }